BlackBerry 9900/9930 slider hitting Sprint?

Some info from BGR regarding the unknown BlackBerry slider: according to one of their trusted contacts, the same device they recently saw was Sprint branded, and will apparently be called BlackBerry 9900 and 9930. There will also be a GSM/HSPA model supporting 850/1900MHz UMTS bands which would make it compatible with both AT&T and Rogers’ 3G networks.

Could Sprint be the exclusive carrier for the first slider BlackBerry?